package org.smart4j.chapter2.util;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * 属性文件工具
 */
public class PropsUtil {

    private static final Logger logger = LoggerFactory.getLogger(PropsUtil.class);

    public static Properties loadProps(String fileName){
        Properties props = null;
        InputStream is = null;
        try{
            is = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if(is==null){
                throw new FileNotFoundException(fileName+" file is not found");
            }
            props = new Properties();
            props.load(is);
        }catch (IOException e){
            logger.error("load properties file failure",e);
        }finally {
            if( is!=null ){
                try {
                    is.close();
                } catch (IOException e) {
                    logger.error("close input stream failure",e);
                }

            }
        }
        return props;
    }

    public static String getString(Properties properties,String key){
        return getString(properties,key,"");
    }

    public static String getString(Properties properties, String key, String s) {
        String value = s;
        if(properties.containsKey(key)){
            value = properties.getProperty(key);
        }
        return value;
    }

    public static int getInt(Properties props,String key){
        return getInt(props,key,0);
    }

    public static int getInt(Properties props, String key, int defaultValue) {
        int value = defaultValue;
        if(props.containsKey(key)){
            value = CastUtil.castInt(props.getProperty(key));
        }
        return value;
    }

    public static boolean getBoolean(Properties props,String key){
        return getBoolean(props,key,false);
    }

    public static boolean getBoolean(Properties props, String key, boolean deffaultValue) {
        boolean value = deffaultValue;
        if(props.containsKey(key)){
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }


}
